초록 ▼

A method for permformation of microporous ceramic membranes onto a porous support includes placing a colloidal suspension of metal or metal oxide particles on one side of the porous support and exposing the other side of the porous support to a drying stream of gas or a reactive gas stream so that t

A method for permformation of microporous ceramic membranes onto a porous support includes placing a colloidal suspension of metal or metal oxide particles on one side of the porous support and exposing the other side of the porous support to a drying stream of gas or a reactive gas stream so that the particles are deposited on the drying side of the support as a gel. The gel so deposited can be sintered to form a supported ceramic membrane useful for ultrafiltration, reverse osmosis, or molecular sieving having mean pore sizes less than 100 Angstroms.

대표청구항 ▼

A method of preparing a microporous metal oxide ceramic membrane on a porous support with two sides comprising the steps of (a) making a colloidal non-polymeric suspension of metal or metal oxide colloidal particles in a solvent; (b) exposing the colloidal suspension to one side of the porous suppor

A method of preparing a microporous metal oxide ceramic membrane on a porous support with two sides comprising the steps of (a) making a colloidal non-polymeric suspension of metal or metal oxide colloidal particles in a solvent; (b) exposing the colloidal suspension to one side of the porous support under conditions so that the suspension is drawn by capillary action into the porous support; (c) exposing the other side of the support to a gas stream gas under conditions favoring evaporation of the solvent in the colloidal suspension so that a gel layer of metal oxide is deposited on said other side of the porous support; (d) drying any remaining solvent from the gel layer; and (e) firing the support with the gel layer thereon at a temperature sufficient to sinter the gel into a ceramic membrane while maintaining the pores therein.